Improved device foe ventilating millstones



y n. SYMES. Ventilating Millstnes..

Patented June 30,- 1868.

N PETERS. PHQTO-LATNOGRAPHER, WASHlNGToN. D C.

@tintin faire @anni @firm- Letters Patent No. 79,517, dated Juize 30, 1868-.

. IMPROVED DEVICE FOR VBNTILAI'ING MILLSTONES.

' ein .rlgehule nitriet tu in tiges@ ettsrs ntmt vut-mattutina nf tige stmt.

:T0 ALL WHOM IT MAY CONCERN:

-Be it known that I, ROBERT SYMES, ofthe city and county of St. Charles, State of Missouri, have invented 'a new and useful Improved Method of Ventilating Millstones, of which the`following is a full, clear, and exact' description, reference being had toitbe annexed drawing, makinga part of this specification, in which- .Figure lrepresents a vertical section of' my invention. Figure 2 represents a back view ofthe runner-stone. Similar letters indicate like parts.

My mill, hopper,hopper-frame,l &c., are constructed in the ordinary manner. vThe spindle is extended tio the point a', fig. 1, and has at its extremity a pulley,l which, by means of a. beltgisconnected with a smaller pulley at'b, on the extremity of the upright driving-shaft C, vthe pulley at b being` so much smaller than 'that at a, as t revolve about seven times as fast. The 1unner.]3, figs. 1 and 2, has upon its back wings' e e e"l e", 5g; 2, (e el md part of ell/ being Shown in iig. 1,) Which are curved at the'top in the direction'oi` its revolution, and made so high above the surface ofthe runner as to t closely against the cover` of the mealboo'p'. lAt f, iig. 1, a pipe, D, opening into the meal-hoop, leads to a condenser, E, which is'enclosed in a jacket lled withcold water.'A The water may be made to flow continually through this jacket, thereby quickening the condensation. A pipe, F, connects the condenser withthe outer air, and its extremity may be covered in.any

manner most suitable to increase the draught, and exclude rain and snow. v

At thermouth of'the pipe D, on'the inside of th'e meal-hoop, a metal shield, o, figs. 1 'and 2, is placed at an angleof abouttwenty degrees'from the perpendicular, leaving space enough 4only between italici` the runner" to allow the latter to revolve freely. 'The wheat-tube g, iig. 1, extends below the cold-blast tube t, iig. l, into the eyc, figs. '1' `and 2, ofthe runner.. l

The mill being in motion, the natural suction ofthe runner' is assisted by the blower M, fig. 1, worked by the shaft @sending a blast of cold air down the pipe t, through the dress ofthe ruiiner, and out into the.menlhoop, till, striking against the.sliield.o,it'is driven up th'e` pipeD into the condenser E.

To prevent the air from passing upjthe cold-blast tube, a covering is made to fit closely ovei the 'top of same, While the natural suction of thel stonethrough the eye prevents the airfrom passing u .p the wheat-tithe.l

This cold blast assists the ifalling ofthe wheat from the hopper, drivesf'themealand' dnst through the dress of the runner, preventing it from clogging, und also lessens the frequency of' renewing the .dressf -It also takes with it, up the pipe D, the liotair and dust, the latter being deposited in the condenser, from which it removed through two hand-holes in the same.

The advantages of my invention co'nsistin rcmovingthe fine particlesof-ilour `from the dress, causing the stone to were on the grain faster, and preserving the ionr from any frictiongmore than necessary to its manufacture. ibc ilourbeing cooled, is sooner ready for packing, and not soli'a'liletbfbecome damp and sour by standing.

i I do not claim to be the original and first inventor of a method of ventilating millstoncs; but

' 'What I do claim as my invention, and desire to secure by Letters Patent, is 1 The blower M,coldblas`t. tube'g, fans e e e e, tube, D, and condenser :ii-ranged substantially as h 1 c'fi d. s 0W an spe l e noBER'rsYMEs.

Witnesses :v FnEnnrcK MELKERSMAN,

DANIEL OURRIE. 

